get CustomStreamConfigurationMap with a custom CameraCharacteristics Key

CameraStreamConfigurations.java

package com.example.util;

import android.annotation.SuppressLint;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.params.StreamConfigurationMap;

import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;

public class CameraStreamConfigurations {

//    public static final CameraCharacteristics.Key<android.hardware.camera2.params.StreamConfiguration[]> SCALER_AVAILABLE_STREAM_CONFIGURATIONS =
//            new CameraCharacteristics.Key<android.hardware.camera2.params.StreamConfiguration[]>("android.scaler.availableStreamConfigurations", android.hardware.camera2.params.StreamConfiguration[].class);

    @SuppressLint("PrivateApi")
    public static StreamConfigurationMap getCustomStreamConfigurationMap(CameraCharacteristics cameraCharacteristics) {

        try {
            // 1. get CUSTOM_SCALER_AVAILABLE_STREAM_CONFIGURATIONS field
            // final CameraCharacteristics.Key<StreamConfiguration[]> CUSTOM_SCALER_AVAILABLE_STREAM_CONFIGURATIONS =
            //     new CameraCharacteristics.Key<>("XXX.XXX.availableStreamConfigurations", StreamConfiguration[].class);
            Class<?> streamConfigurationArrayClazz = Class.forName("[Landroid.hardware.camera2.params.StreamConfiguration;");
            Class<?> cameraCharacteristicsKeyClazz = Class.forName("android.hardware.camera2.CameraCharacteristics$Key");
            Class<?>[] params = {String.class, Class.class};
            Object[] values = {"XXX.XXX.availableStreamConfigurations", streamConfigurationArrayClazz};
            Constructor<?> constructor = cameraCharacteristicsKeyClazz.getDeclaredConstructor(params);
            CameraCharacteristics.Key<?> MI_SCALER_AVAILABLE_STREAM_CONFIGURATIONS
                    = (CameraCharacteristics.Key<?>) constructor.newInstance(values);

            // 2. get StreamConfiguration[]
            Object configurations = cameraCharacteristics.get(MI_SCALER_AVAILABLE_STREAM_CONFIGURATIONS);

            // 3. get capabilities
            int[] capabilities = cameraCharacteristics.get(CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES);
            boolean listHighResolution = false;
            for (int capability : capabilities) {
                if (capability == CameraCharacteristics.REQUEST_AVAILABLE_CAPABILITIES_BURST_CAPTURE) {
                    listHighResolution = true;
                    break;
                }
            }

            // 4. get StreamConfigurationMap
            Class streamConfigurationMapClazz = Class.forName("android.hardware.camera2.params.StreamConfigurationMap");
            Class reprocessFormatsMapClazz = Class.forName("android.hardware.camera2.params.ReprocessFormatsMap");

            Class<?>[] streamConfigurationMapParams = {
                    Array.class,
                    Array.class,
                    Array.class,
                    Array.class,
                    Array.class,
                    Array.class,
                    Array.class,
                    reprocessFormatsMapClazz,
                    Boolean.class
            };

            Object[] streamConfigurationMapValues = {
                    configurations,
                    cameraCharacteristics.get(getFiled("SCALER_AVAILABLE_MIN_FRAME_DURATIONS")),
                    cameraCharacteristics.get(getFiled("SCALER_AVAILABLE_STALL_DURATIONS")),
                    cameraCharacteristics.get(getFiled("DEPTH_AVAILABLE_DEPTH_STREAM_CONFIGURATIONS")),
                    cameraCharacteristics.get(getFiled("DEPTH_AVAILABLE_DEPTH_MIN_FRAME_DURATIONS")),
                    cameraCharacteristics.get(getFiled("DEPTH_AVAILABLE_DEPTH_STALL_DURATIONS")),
                    cameraCharacteristics.get(getFiled("CONTROL_AVAILABLE_HIGH_SPEED_VIDEO_CONFIGURATIONS")),
                    cameraCharacteristics.get(getFiled("SCALER_AVAILABLE_INPUT_OUTPUT_FORMATS_MAP")),
                    listHighResolution
            };

            Constructor<?> streamConfigurationMapConstructor
                    = streamConfigurationMapClazz.getDeclaredConstructor(streamConfigurationMapParams);

            StreamConfigurationMap mStreamConfigurationMap
                    = (StreamConfigurationMap) streamConfigurationMapConstructor.newInstance(streamConfigurationMapValues);

            return mStreamConfigurationMap;
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
        return null;
    }


    static CameraCharacteristics.Key<Object> getFiled(String filed) {
        CameraCharacteristics.Key<Object> result = null;
        try {
            Field f = CameraCharacteristics.class.getField(filed);
            result =  (CameraCharacteristics.Key<Object>) f.get(null);
        } catch (NoSuchFieldException | IllegalAccessException e) {
            e.printStackTrace();
        }

        return result;
    }
}